The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 40 g |
55¢ |
90¢ |
Every additional 10 g |
25¢ |
35¢ |
Ivan paid $5.15 for posting a package locally. What was the greatest possible mass of the package that Ivan posted?
$1 = 100¢
$5.15 = 5.15 x 100 = 515¢
Amount that Ivan paid for the additional sets of 10 g for the local package
= 515 - 55
= 460¢
Number of sets of 10 g that Ivan paid for the local package
= 460 ÷ 10
= 46
Mass of 46 sets of 10 g for the local package
= 46 x 10
= 460 g
Greatest possible mass of the local package
= 40 + 460
= 500 g
Answer(s): 500 g